"The service at Pegasus was incredible. There were several different products that I could have used and they walked me through each one to help me make the most informed decision. Since I have a Turbo Honda motor in my Lotus, I didn't expect them to be experts on this swap, but they still gave me all the base info on how the electronics should communicate with each other. That helped me decide what parts I should get and how to expect them to work in the car." K.L. from Illinois

Setrab Thermal Fan Switch, 190 F, 1/8 NPT

This thermal switch is designed to activate your fan relay when the fluid temperature reaches 190° F (88° C). The switch turns off when the temperature drops down to 170° F (77° C). Installs easily in any 1/8 NPT hole. Two 1/4" spade terminals make electrical hook up easy. The switch is non-grounding, so it can be installed anywhere in the system.

Note: This switch is not rated for the current draw of the fan. It must be used to control a fan relay.